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|Titan Engine, Transmission & Drivetrain Technical discussion about the engine, transmission, and drivetrain.|
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SELF-DIAGNOSTIC PROCEDURE (WITHOUT CONSULT-II) Description If the engine starts when there is something wrong with the 4WD system, the 4WD warning lamp turns ON or flickers in the combination meter. When the system functions properly, the warning lamp turns ON when the ignition switch is turned to “ON”, and it turns OFF after engine starts. To locate the cause of a problem, start the self-diagnosis function. The 4WD warning lamp in the combination meter will indicate the problem area by flickering according to the self-diagnostic results. As for the details of the 4WD warning lamp flickering patterns, refer to TF-36, "Diagnostic procedure" .
1. Warn up engine.
2. Turn ignition switch “ON” and “OFF” at least twice, and then turn ignition switch “OFF”.
3. Move A/T selector lever to “P” position.
4. Turn 4WD shift switch to “2WD” position.
5. Turn ignition switch “ON”. (Do not start engine.)
6. 4WD warning lamp ON. If 4WD warning lamp does not turn ON, refer to TF-70, "4WD Warning Lamp Does Not Turn ON" .
7. Move A/T selector lever to “R” position.
8. Turn 4WD shift switch to “2WD”, “4H” and “2WD” in order.
9. Move A/T selector lever to “P” position.
10. Turn 4WD shift switch to“4H”, “2WD” and “4H” in order.
11. Move A/T selector lever to “N” position.
12. Turn 4WD shift switch to“2WD” position.
13. Move A/T selector lever to “P” position.
14. Read the flickering of 4WD warning lamp. Refer to TF-36, "Judgement self-diagnosis" .
This is the first and only post that provides any actual information about diagnosing this 4x4 problem (where the front wheel icons flash, go away, and the yellow 4WD light comes on solid).
Thanks for being thorough in the details posted. I need some help though. Where did you find the list of codes / descriptions once you got the number code from the flashing light?
I've been digging all over for info, but I think i'm searching the wrong terms
well, I sorta solved my problem. Back in December a drunk driver slammed me off the highway at 70mph... spun out, cleared a 5' deep 20' wide ditch, crossed the service road, and stopped in the right-of-way on the far side of the service road.
Insurance totaled the truck... so, I never did chase down the problem.
I had already swapped the two smaller relays under the hood, but those didn't fix anything for me. I believe I was going to pull the actuator on the transfer case next and/or do a fluid change. I suspect it was very low.
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